CN102148488B - Circuit device - Google Patents
Circuit device Download PDFInfo
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- CN102148488B CN102148488B CN201010113908.5A CN201010113908A CN102148488B CN 102148488 B CN102148488 B CN 102148488B CN 201010113908 A CN201010113908 A CN 201010113908A CN 102148488 B CN102148488 B CN 102148488B
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Abstract
The invention relates to a circuit device, which comprises an AC power circuit, a detection signal generation circuit and a detection circuit, wherein the AC power circuit comprises an AC power supply with a given period, a load and a relay connected between the AC power supply and the load; the detection signal generation circuit generates a detection signal corresponding to a voltage output by the AC power supply, and is provided with a plurality of resistors, a diode connected in parallel with one of the plurality of resistors, and a bidirectional optical coupler connected in parallel with another of the plurality of resistors; the detection circuit is provided with a triode, a singlechip and an inverter; and the input end of the detection circuit is connected with the output end of the detection signal generation circuit and inputs a detection signal, and the output end of the detection circuit is connected with the relay by the inverter.
Description
Technical field
The present invention relates to circuit arrangement.
Background technology
As depicted in figs. 1 and 2, existing circuit arrangement comprises the testing circuit 3 of the frequency detecting AC power AC.When the dividing potential drop on R3 of the forward voltage of AC power AC exceedes the operating voltage Δ V of the diode of the emission side of one-way type light lotus root PC1, the LED lighting of the emission side of one-way type light lotus root PC1, the triode ON of the sensitive side of one-way type light lotus root PC1, the voltage Vin that single-chip microcomputer IC1 receives is high level.As the operating voltage Δ V of the dividing potential drop of AC power AC on R3 lower than the diode of emission side, the diode of the emission side of one-way type light lotus root PC1 is not luminous, the triode not conducting of the sensitive side of one-way type light lotus root PC1.The voltage Vin that single-chip microcomputer IC1 receives is low level.According to the voltage Vin that single-chip microcomputer IC1 receives, cycle T and the frequency f of this AC power AC can be judged.
But there is following problem in above-mentioned testing circuit 3: when the voltage of AC power AC is abnormally high-voltage, single-chip microcomputer IC1 cannot detect this abnormally high-voltage, so, cannot protect load and power component.
Summary of the invention
The present invention is in view of above-mentioned problem, on the basis of existing circuit arrangement, after resistance is connected with diodes in parallel, be connected in series to detection signal generative circuit again, use two-way type light lotus root with time lotus root, thus the frequency detecting that can realize AC power also can realize the detection of the abnormal voltage of AC power.Namely the present invention also can realize for the purpose of the circuit arrangement of the detection of the abnormal voltage of AC power to provide a kind of frequency detecting that can realize AC power.
Therefore, circuit arrangement involved in the present invention, possesses AC power circuit, and it comprises the AC power in the cycle with regulation, load, is connected to relay between AC power and load; Detection signal generative circuit, it corresponds to the voltage that exports from described AC power and generates detection signal, and possess multiple resistance, with a diode be connected in parallel in described multiple resistance, with another the two-way type light lotus root be connected in parallel in described multiple resistance; And testing circuit, it possesses triode, single-chip microcomputer and reverser, wherein, the input of described testing circuit is connected to the output of described detection signal generative circuit and inputs described detection signal, and the output of described testing circuit is connected to described relay via described reverser.
In addition, in above-mentioned circuit arrangement involved in the present invention, the anode of described diode is connected to the live wire of described AC power, negative electrode is connected to the zero line of described AC power via described resistance, at the forward voltage exported from described AC power when the described ohmically dividing potential drop in parallel with described two-way type light lotus root is greater than the operating voltage of described two-way type light lotus root and when exceeding the voltage of regulation at the reverse voltage exported from described AC power, the conducting of described two-way type light lotus root, and export high level to the described input of described testing circuit, the number of times that the reverse voltage exported from described AC power in the cycle described in 5 continuous print exceedes the voltage of regulation is more than 3 times, the signal exported from the output of described testing circuit makes described relay disconnect.
In addition, in above-mentioned circuit arrangement involved in the present invention, the negative electrode of described diode is connected to the live wire of described AC power, anode is connected to the zero line of described AC power via described resistance, when the reverse voltage exported from described AC power be greater than the operating voltage of described two-way type light lotus root in the described ohmically dividing potential drop in parallel with described two-way type light lotus root, the conducting of described two-way type light lotus root, and export high level to the described input of described testing circuit, when the forward voltage exported from described AC power exceedes the voltage of regulation, the conducting of described two-way type light lotus root, and export high level to the described input of described testing circuit, the number of times that the forward voltage exported from described AC power in the cycle described in 5 continuous print exceedes the voltage of regulation is more than 3 times, the signal exported from the output of described testing circuit makes described relay disconnect.
In addition, in above-mentioned circuit arrangement involved in the present invention, described relay is solid-state relay.
According to circuit arrangement involved in the present invention, the frequency of AC power can be detected.In addition, if there is abnormally high-voltage in AC power, so single-chip microcomputer IC can detect the occurrence number of this abnormally high-voltage.The occurrence number of abnormally high-voltage is more than 3 times in continuous 5 cycles, according to the signal that the output from single-chip microcomputer exports, relay is disconnected, thus avoid the destruction of power component that abnormal voltage causes and load.
Therefore, according to circuit arrangement involved in the present invention, can provide and can realize frequency detecting and abnormal voltage simultaneously and detect and low-cost circuit arrangement.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of the structure representing existing circuit arrangement.
Fig. 2 is the sequential chart of the testing circuit of existing circuit arrangement.
Fig. 3 is for representing the circuit diagram of the structure of the circuit arrangement involved by the 1st execution mode of the present invention.
The sequential chart of the testing circuit of the circuit arrangement of Fig. 4 involved by the 1st execution mode of the present invention.
Fig. 5 is for representing the circuit diagram of the structure of the circuit arrangement involved by the 2nd execution mode of the present invention.
The sequential chart of the testing circuit of the circuit arrangement of Fig. 6 involved by the 2nd execution mode of the present invention.
Fig. 7 is the flow chart of circuit arrangement involved in the present invention.
Embodiment
Below, with reference to accompanying drawing, preferred forms of the present invention is described in detail.At this, in the explanation of figure, to same key element mark prosign, the repetitive description thereof will be omitted.
(the 1st execution mode)
Fig. 3 is for representing the circuit diagram of the structure of the circuit arrangement involved by the 1st execution mode of the present invention.The sequential chart of the testing circuit of the circuit arrangement of Fig. 4 involved by the 1st execution mode of the present invention.
As shown in Figure 3, circuit arrangement possesses AC power circuit 10, detection signal generative circuit 20 and testing circuit 30.
AC power circuit 10 comprises AC power AC, the relay R Y-PWR of the cycle T (frequency f=1/T) with regulation, load LOAD, relay R Y-PWR are connected between AC power AC and load LOAD.
The two-way type light lotus root PC10 that detection signal generative circuit 20 comprises resistance R1 ~ R3, is connected in parallel in the diode D1 at the two ends of resistance R1, is connected in parallel in the two ends of resistance R3.Two-way type light lotus root PC10 comprises the diode of 2 opposite polarity emission side and the triode of sensitive side.The anode of diode D1 is connected to the live wire of AC power AC, and the negative electrode of diode D1 is connected to the zero line of AC power AC via resistance R2, R3.
Testing circuit 30 comprises triode Q1, single-chip microcomputer IC1 and reverser IC2.The input PortA of single-chip microcomputer IC1 is connected to the output of detection signal generative circuit 20, and the voltage signal Vin that input generates in signal generating circuit 20.The output of single-chip microcomputer IC1 is connected to relay R Y-PWR via reverser IC2, and the unlatching of control relay RY-PWR (ON) and disconnection (OFF).
As shown in Figure 4, in the standby state, connect AC power AC, after single-chip microcomputer IC 1 resets, testing circuit 30 carries out frequency detecting to AC power AC immediately and detects the abnormally high-voltage in reverse voltage.
When the dividing potential drop on the resistance R3 in parallel with two-way type light lotus root PC10 of the forward voltage of the voltage Vac exported from AC power AC is greater than the operating voltage Δ V of two-way type light lotus root PC10, two-way type light lotus root PC10 conducting, and export high level to single-chip microcomputer IC1, when the dividing potential drop on resistance R3 of voltage Vac is less than operating voltage Δ V, two-way type light lotus root PC10 not conducting, and to single-chip microcomputer IC1 output low level.When the reverse voltage exported from AC power AC exceedes the voltage Vlimit of regulation, two-way type light lotus root PC10 also conducting, and export high level to single-chip microcomputer IC1, thus single-chip microcomputer IC1 detects this abnormally high-voltage.
After the input PortA of single-chip microcomputer IC1 receives voltage signal Vin, judge the frequency signal in this signal and abnormally high-voltage signal.Thus single-chip microcomputer IC1 can detect the number of times that the frequency of AC power AC and abnormal voltage occur and time.
Under operating condition, the output PortB of single-chip microcomputer IC1 exports high level, thus makes relay R Y-PWR open (ON), and load is started working.
In 5 continuous print cycle T, reverse voltage exceedes the number of times of the voltage Vlimit of regulation when being more than 3 times; namely under guard mode; the signal exported from the output PortB of testing circuit 3 makes relay R Y-PWR disconnect (OFF), and load quits work, and enters holding state.Thus the destruction that the abnormally high-voltage avoiding lasting AC power AC causes relay R Y-PWR and load LOAD, and load LOAD is protected.
Fig. 7 is the flow chart of circuit arrangement involved in the present invention.As shown in Figure 7, first, in the standby state, system initialization, relay R Y-PWR disconnects.Then, testing circuit carries out frequency detecting and abnormally high-voltage detects, and when abnormally high-voltage not detected (namely when the occurrence number of abnormally high-voltage is less than 3 times), relay R Y-PWR opens, load entry into service.Then, if testing circuit detects abnormally high-voltage, and in 5 cycles of continuous print, the occurrence number of abnormally high-voltage is more than 3 times, and so relay R Y-PWR disconnects, and load is out of service, and shows abnormal signal.
(the 2nd execution mode)
Fig. 5 is for representing the circuit diagram of the structure of the circuit arrangement involved by the 2nd execution mode of the present invention.The sequential chart of the testing circuit of the circuit arrangement of Fig. 6 involved by the 2nd execution mode of the present invention.
Circuit arrangement involved by 2nd execution mode is except the polarity of diode D10 is contrary with the polarity of diode D1, identical with the structure of the circuit arrangement involved by the 1st execution mode.Namely the negative electrode of diode D10 is connected to the live wire of AC power AC, and anode is connected to the zero line of AC power AC via resistance R2, R3.
As shown in Figure 6, in the standby state, connect AC power AC, after single-chip microcomputer IC 1 resets, testing circuit 30 carries out frequency detecting to AC power AC immediately and detects the abnormally high-voltage in forward voltage.
When the dividing potential drop on the resistance R3 in parallel with two-way type light lotus root PC10 of the negative voltage of the voltage Vac exported from AC power AC is greater than the operating voltage Δ V of two-way type light lotus root PC10, two-way type light lotus root PC10 conducting, and export high level to single-chip microcomputer IC1, when the dividing potential drop on resistance R3 of voltage Vac is less than operating voltage Δ V, two-way type light lotus root PC10 not conducting, and to single-chip microcomputer IC1 output low level.When the forward voltage exported from AC power AC exceedes the voltage Vlimit of regulation, two-way type light lotus root PC10 conducting, and export high level to single-chip microcomputer IC1, thus single-chip microcomputer IC1 detects this abnormally high-voltage.
After the input PortA of single-chip microcomputer IC1 receives voltage signal Vin, judge the frequency signal in this signal and abnormally high-voltage signal.Thus single-chip microcomputer IC1 can detect the number of times that the frequency of AC power AC and abnormal voltage occur and time.
Under operating condition, the output PortB of single-chip microcomputer IC1 exports high level, thus makes relay R Y-PWR open (ON), and load is started working.
In 5 continuous print cycle T, forward voltage exceedes the number of times of the voltage Vlimit of regulation when being more than 3 times; namely under guard mode; the signal exported from the output PortB of testing circuit 3 makes relay R Y-PWR disconnect (OFF), and load quits work, and enters holding state.Thus the destruction that the abnormally high-voltage avoiding lasting AC power AC causes relay R Y-PWR and load LOAD, and load LOAD is protected.
(embodiment 1)
Below, circuit arrangement involved in the present invention is carried out more specifically bright with reference to embodiment 1.
When above-mentioned circuit arrangement applies in actual electrical equipment (such as air-conditioning), load is fan motor etc.
Such as, AC supply voltage AC is 220V, and frequency is 50Hz, and abnormal voltage (voltage namely specified) is set as that (at this, Vmax is the crest value of AC supply voltage to Vlimit=1.3Vmax
then 1.3Vmax ≈ 404V).
Push the power supply of air-conditioning aside, single-chip microcomputer IC1 starts to carry out the detection of the forward voltage in the frequency detecting of AC power AC and AC power AC higher than the abnormally high-voltage of Vlimit (≈ 404V).Now, air-conditioning is in holding state, and the relay R Y-PWR controlling the running of fan motor is in OFF state.
After user makes air-conditioning be in operating condition by remote controller or other modes, single-chip microcomputer IC1 exports high level signal (+5V) from output PortB, makes relay R Y-PWR open (ON), thus fan motor entry into service.
In the operation process of fan motor, at continuous 5 cycle T (T=0.02s of AC power AC, then 5T=0.1s) in, when the number of times of abnormal voltage of the 1.3Vmax (≈ 404V) exceeding setting is more than or equal to 3 times, single-chip microcomputer IC1 is from output PortB output low level (0V).Thus make relay R Y-PWR disconnect (OFF), prevent the abnormally high-voltage of AC power AC to the destruction of relay and fan motor.Use charactron etc. to show error code simultaneously.If supply voltage is at continuous 5 cycle T (T=0.02s, then 5T=0.1s) in, when the number of times exceeding the abnormally high-voltage of the 1.3Vmax (≈ 404V) of setting is less than 3 times, testing circuit continues to catch abnormal voltage signal, and fan motor normally works.
Above, the 1st and the 2nd execution mode of circuit arrangement involved in the present invention and embodiment 1 are illustrated.
But circuit arrangement involved in the present invention is not limited to above-mentioned execution mode and embodiment, those skilled in the art can be out of shape the present invention when not departing from connotation of the present invention and scope as required and change.These distortion and change all fall within the scope of the present invention.
According to above-mentioned circuit arrangement involved in the present invention, frequency detecting can be carried out to AC power AC, and can detect the forward voltage in AC power AC or the abnormally high-voltage in reverse voltage.After abnormally high-voltage in AC power AC meets above-mentioned Rule of judgment, above-mentioned circuit arrangement can make load enter guard mode, thus avoids the destruction of the electronic components such as load.And, above-mentioned circuit arrangement low price.
Claims (4)
1. a circuit arrangement, is characterized in that, possesses,
AC power circuit, it comprises the AC power in the cycle with regulation, load, is connected to relay between AC power and load;
Detection signal generative circuit, it corresponds to the voltage that exports from described AC power and generates detection signal, and possess be connected in series multiple resistance, with a diode be connected in parallel in described multiple resistance and with another the two-way type optocoupler be connected in parallel in described multiple resistance; And
Testing circuit, it possesses the triode, single-chip microcomputer and the reverser that are connected in series,
The input of described single-chip microcomputer is connected to the output of described detection signal generative circuit via described triode, and inputs described detection signal,
The output of described single-chip microcomputer is connected to described relay via described reverser.
2. circuit arrangement as claimed in claim 1, is characterized in that,
The anode of described diode is connected to the live wire of described AC power, negative electrode via in described multiple resistance except with the resistance of described diodes in parallel except all the other resistance and be connected to the zero line of described AC power,
At the forward voltage exported from described AC power when the described ohmically dividing potential drop in parallel with described two-way type optocoupler is greater than the operating voltage of described two-way type optocoupler or when exceeding the voltage of regulation at the reverse voltage exported from described AC power, the conducting of described two-way type optocoupler, and export high level to the described input of described single-chip microcomputer
The number of times that the reverse voltage exported from described AC power in the cycle described in 5 continuous print exceedes the voltage of regulation is more than 3 times, the signal exported from the output of described testing circuit makes described relay disconnect.
3. circuit arrangement as claimed in claim 1, is characterized in that,
The negative electrode of described diode is connected to the live wire of described AC power, anode via in described multiple resistance except with the resistance of described diodes in parallel except all the other resistance and be connected to the zero line of described AC power,
When the negative voltage exported from described AC power be greater than the operating voltage of described two-way type optocoupler in the described ohmically dividing potential drop in parallel with described two-way type optocoupler, the conducting of described two-way type optocoupler, and export high level to the described input of described single-chip microcomputer, when the forward voltage exported from described AC power exceedes the voltage of regulation, the conducting of described two-way type optocoupler, and export high level to the described input of described single-chip microcomputer
The number of times that the forward voltage exported from described AC power in the cycle described in 5 continuous print exceedes the voltage of regulation is more than 3 times, the signal exported from the output of described testing circuit makes described relay disconnect.
4., as the circuit arrangement in claims 1 to 3 as described in any one, it is characterized in that,
Described relay is solid-state relay.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010113908.5A CN102148488B (en) | 2010-02-09 | 2010-02-09 | Circuit device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010113908.5A CN102148488B (en) | 2010-02-09 | 2010-02-09 | Circuit device |
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| Publication Number | Publication Date |
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| CN102148488A CN102148488A (en) | 2011-08-10 |
| CN102148488B true CN102148488B (en) | 2015-04-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010113908.5A Active CN102148488B (en) | 2010-02-09 | 2010-02-09 | Circuit device |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102830262B (en) * | 2012-08-27 | 2015-04-22 | 无锡安邦电气有限公司 | Alternating current detection circuit based on bidirectional optocoupler |
| CN107966608A (en) * | 2017-12-02 | 2018-04-27 | 上海仪电科学仪器股份有限公司 | A kind of measuring circuit for gathering bi-directional voltage signal |
| CN111478291A (en) * | 2020-05-27 | 2020-07-31 | 江西电力职业技术学院 | Relay protection method and device for smart home |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1275831A (en) * | 1999-05-26 | 2000-12-06 | 松下电器产业株式会社 | Converter circuit |
| CN201008141Y (en) * | 2007-02-02 | 2008-01-16 | 白世忠 | Two wire terminal intelligent power supply switch |
| CN201247944Y (en) * | 2008-06-23 | 2009-05-27 | Abb新会低压开关有限公司 | Chopping voltage-limiting power-supply circuit |
-
2010
- 2010-02-09 CN CN201010113908.5A patent/CN102148488B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1275831A (en) * | 1999-05-26 | 2000-12-06 | 松下电器产业株式会社 | Converter circuit |
| CN201008141Y (en) * | 2007-02-02 | 2008-01-16 | 白世忠 | Two wire terminal intelligent power supply switch |
| CN201247944Y (en) * | 2008-06-23 | 2009-05-27 | Abb新会低压开关有限公司 | Chopping voltage-limiting power-supply circuit |
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| Publication number | Publication date |
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| CN102148488A (en) | 2011-08-10 |
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Effective date of registration: 20150928 Address after: Osaka Japan Patentee after: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT Co.,Ltd. Address before: Osaka Japan Patentee before: Matsushita Electric Industrial Co.,Ltd. |